Hinge



-- UNITED STATES PATENT OFFICE.

JOSEPH PLEGAR, OF BIRNHNGHAM, PENNSYLVANIA.

HINGE.

Specification of Letters Patent No. 13,321, dated July 24, 1855.

To all whom it may concern.'

Be it known that I, JOSEPH PLEGAR, of Birmingham, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement upon Hinges; and I do hereby declare that the following is afull and exact description.

Letter a represents a full View of the hinge open.

b is the bolt on the pin part of the hinge.

c is an end view of the bolt showing thel when freed from the cup orsocket. Tlie internal arrangement of the upper part of the hingeembraces three distinct features: lst, its cup or socket for thereception of the bolt; 2nd, its bearings for the pivot of the bolt, inthis position the bolt being completely protected from accident orweather.

The advantages of my arrangement are, lst, the positive accuracy ofthis' hinge through the chilling process, the cup or socket being madeof uniform size and shape by the metal ruiming around chills that areturned to gage; 2nd, the'durability of this arrangement; the inclosureor cup or socket becomes hardened by the chilling process; also there isa smooth surface produced' by which the free action of the hinge isaug-v mented; also its security by its inclosed position from rust orthe liability to accident; 3d, the certainty of fastening shutters open,as the cup falls over the pin, which enters the socket and therebydispenses with other fastenings on the wall which are always uncertain.

lVhat I claim as my invention and desire to secure by Letters Patent is*Making a bolt on the pin part of the hinge and a cup or socket in theupper section of the hinge to receive the bolt, as herein set forth.

Witnesses: JOSEPH PLEGAR.

ANDREW LONG, A. MEADER,

